40mm FCR-typcarburetor features four rollers on the flat slide, resulting in very light throttle effort, smooth operation, crisp throttle response and excellent rideability. Bottom of float chamber redesigned to allow more fuel to pass to the main jet.

Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates clutch and transmission material contamination to the engine oil, and reduces the amount of circulating oil and the required size of the oil pump.

Semi-double-cradle design features a single, large-diameter tapered downtube. Two rugged box-section rails attach to the base of the downtube and support the engine. A forged aluminum steering head provides a compact and extremely durable mount for the frame spars and engine downtube.

The aluminum frame design is matched to rider ergonomics to maximize handling and control operation.

Swingarm features a dual-axis, double-taper design with a large cast aluminum cross-member. End piece has been redesigned for a weight savings of almost 1 ounce.

Lightweight, 47mm inverted Showa® twin-chamber cartridge fork with aluminum dampers is derived from the CR250R and features settings unique to the CRF. The fork offers 12.4 inches of travel, 16-position rebound and 16-position compression damping adjustability. The inner surface of front fork outer-tubes receive same honing treatment as works bikes for low-friction operation. First time on a mass production motocrosser.

Ownership includes one-year complimentary Membership in the Honda Rider’s Club of America"¢. Benefits include discounts, travel benefits, roadside assistance and much more. For HRCA® details, call 1-800-847-HRCA.

Specifications

Model

CRF450R

Engine Type

449cc liquid-cooled single-cylinder four-stroke

Bore and Stroke

96mm x 62.1mm

Compression Ratio

12.0:1

Valve Train

Unicam; four-valve

Carburetion

Keihin 40mm flat-slide

Large, 240mm front and rear brake discs.

Additional Features

Frame design allows sidecovers to have larger air-intake ducts, contributing to significant airflow in the mid- and upper-rpm range.

Rider ergonomics are optimized by adapting the handlebar, the seat and the footpeg height to place the rider’s legs at the narrowest cross-section of the frame, for improved comfort and handling feel.

Seat cushion follows the shape of the fuel tank, providing a smooth transition to increase rider mobility and comfort.

Ownership includes one-year complimentary Membership in the Honda Rider’s Club of America"¢. Benefits include discounts, travel benefits, roadside assistance and much more. For HRCA® details, call 1-800-847-HRCA.